[MetroMPG]

The mods GM made to the Cobalt XFE are easy to do, and cost next to nothing other than the up front engineering. We'll see more automakers respond to GM's move.

The return of competition for sales based primarily on efficiency has already started in the marketing arena - useless changes in messaging from an efficiency perspective.

The "useful" engineering/product development from multiple manufacturers (Honda & Toyota won't stand for GM beating them) will increasingly find its way into showrooms.